http://7fa6xlti5joarlmkuhjaifa47ukgcwz6tfndgax45ocyn4rixm632jid.onion/anonbib/cache/hirt2004thesis.abstract
The need for anonymity has motivated many different anonymous communication schemes: Chaum’s Mixes [7], Onion routing =-=[34, 41, 42, 43]-=-, Crowds [35], Hordes [38], Lucent Personalized Web Assistant (LPWA) [15], Anonymizer [2], Remailer [10] (types 0,1, and 2), Babel [18], Buses [4], DC-Net [8], Xor-trees [13], Peer-to-peer Personal Pr... 215 The security of the cipher block chaining message authentication code - Bellare, Kilian, et al